I'm not a reviewer, but I can do what I can to help.
rpmlint on both the binary (for i686 at least) and SRPMS comes out clean, and
they build flawlessly on my machine. I have no complaints here, you have a
pretty clean package!

Need to be added since kernel 2.6.18-1.2200.fc5, because like many kmod-package
- including of linux/config.h now is deprecated. (i've pick a recent example
from Ville Skyttä)
%prep
Setup ...
grep -rlF '<linux/config.h>' acerhk-%{version} \
| xargs sed -i -e 's|<linux/config.h>|<linux/autoconf.h>|'
Any idea when this package will be accepted on extras?

Same note as for the acerhk-kmod submission:
Marcin: Do you still wish to submit this package?
If I don't hear anything from you in 1 week I will go ahead and close it.
NOTE: from what I can see on the upstream page, this driver is no longer being
maintained...
"Unfortunately I have not the time anymore to actively support this driver, I
even don't own an Acer laptop anymore. If anyone is interested to take over the
job of maintaining this driver, please contact me.
You can still mail me, I will try to help you, but it will take some time and I
am not always able to give help."
(from: http://www.cakey.de/acerhk/)